Analog Devices Inc./Maxim Integrated MAX1110CAP+T

Overview

MAX1110CAP+T from Maxim Integrated is an 8-bit, 8-channel successive-approximation analog-to-digital converter (ADC) with integrated track/hold, 2.048V internal reference, SPI/QSPI/MICROWIRE-compatible serial interface, and software-configurable unipolar/bipolar and single-ended/differential input modes. It operates from a single 2.7V–5.5V supply, draws only 85µA at 50ksps, and targets portable data loggers, handheld measurement devices, and solar-powered remote acquisition systems.

For engineers reviewing the MAX1110CAP+T datasheet, MAX1110CAP+T pinout, MAX1110CAP+T application, or MAX1110CAP+T equivalent, this page delivers verified electrical specs, validated SSOP-20 pin mapping, confirmed low-power operation down to 6µA in software power-down mode, and two rigorously cross-checked alternative ADCs for multichannel 8-bit sampling in battery-constrained embedded designs.

Technical Context

The MAX1110CAP+T implements a capacitor-based SAR architecture with internal track/hold circuitry that acquires signals in ≤1µs and completes conversion in 25µs (internal clock mode) or 10 SCLK cycles (external clock mode). Its analog front-end supports eight single-ended or four differential input pairs (CH0–CH7), with COM referenced zero-code alignment and ±0.5 LSB stability requirement.

Conversion control is fully software-defined via an 8-bit command byte (START/SEL2–SEL0/UNI-BIP/SGL-DIF/PD1–PD0), enabling dynamic reconfiguration of input range, polarity, channel, and clock source without hardware changes. The device accepts external references from 1V to VDD and tolerates digital inputs up to 5.5V independent of VDD.

Key Specifications

Pinout & Package

The MAX1110CAP+T is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, JEDEC MO-153 compliant, and rated for 0°C to +70°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit multichannel ADC applications.

Compared with ADS7822U and TLV2548IPW, the MAX1110CAP+T uniquely combines 50ksps sampling, 8-channel flexibility, internal 2.048V reference, and sub-10µA power-down - making it optimal for high-duty-cycle portable instrumentation where speed, integration, and ultra-low sleep current are jointly critical.

Availability

MAX1110CAP+T is available at Aetrix Electronics and suitable for portable data logging, handheld measurement devices, and solar-powered remote acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX1110CAP+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.

The MAX1110CAP+T belongs to Maxim's low-power serial ADC product line, engineered specifically for battery-operated and energy-harvesting systems needing multichannel 8-bit digitization with minimal external components and deterministic timing.

FAQ

What is the maximum sampling rate of the MAX1110CAP+T and under what conditions is it achieved?

The MAX1110CAP+T achieves a maximum sampling rate of 50ksps when using the external serial clock at 500kHz with 10 clock cycles per conversion. This requires unipolar input mode, full-scale input, and proper 1µF bypassing at REFOUT. At lower clock frequencies or in internal clock mode (25µs conversion time), the effective rate drops to ~40ksps due to fixed overhead. The 50ksps rate is specified across the full 0°C to +70°C temperature range and 2.7V–5.5V supply.

Does the MAX1110CAP+T support differential input configurations, and how are they implemented?

Yes, the MAX1110CAP+T supports four differential input pairs: CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7. Differential mode is enabled by setting bit SGL/DIF = 0 in the 8-bit control byte. The device uses a pseudo-differential architecture where IN+ is sampled and IN− serves as a stable common-mode reference; IN− must remain within ±0.5 LSB of AGND, typically ensured by a 0.1µF capacitor to AGND. Bipolar differential mode yields ±VREFIN/2 input range.

How does the power-down functionality work on the MAX1110CAP+T, and what are the current savings?

The MAX1110CAP+T offers two power-down methods: software-controlled (PD1=0 in control byte) and pin-driven (SHDN pulled low). Software power-down reduces supply current to 6µA at 1ksps and 52µA at 10ksps, while SHDN-driven mode achieves ≤10µA. In both cases, the internal reference remains active unless SHDN is pulled high. Exiting power-down takes 12ms (internal ref) or 20µs (external ref), and the serial interface automatically powers up on CS assertion.

Can the MAX1110CAP+T interface directly with a 3.3V microcontroller, and are level shifters required?

Yes, the MAX1110CAP+T interfaces directly with 3.3V microcontrollers without level shifters. Its digital inputs (CS, SCLK, DIN) tolerate voltages up to 5.5V regardless of VDD, and its outputs (DOUT, SSTRB) swing rail-to-rail between DGND and VDD. When VDD = 3.3V, DOUT and SSTRB are 3.3V-compatible, and the 5.5V tolerance on inputs allows seamless connection to 5V logic if needed later - eliminating BOM cost and layout complexity.

What is the purpose of the COM pin on the MAX1110CAP+T, and how must it be used in single-ended mode?

The COM pin on the MAX1110CAP+T serves as the zero-reference point for single-ended inputs, defining the "0V" level of the input range. In single-ended mode, each channel (CH0–CH7) is measured relative to COM, so the full-scale range is COM to VREFIN + COM. COM must be held stable to ±0.5 LSB during conversion; this is typically achieved by connecting it to a low-impedance AGND or a precision voltage divider. For bipolar operation, COM is set to VREFIN/2.